Can't download Voice Everywhere on my new iPad (6th Generation)

I bought a new iPad about 6 months ago-- the latest model (6th Generation). The Cox app works on it, but when Cox moved the voice tools over to Voice Everywhere, it asked me to install the Voice Everywhere app. When I try to do this, I get the message "This app requires specific features not available on this device." Since my iPad is brand new and I do regular updates on both it and my apps (including the Cox app), I'm very disappointed not to have a feature I once had. I've already had an online chat with Cox, and the link sent to me by the technician did not work. I hope this can be escalated to the app developers. I can send you my email address privately if needed.